Green’s Dictionary of Slang

gytch v.

[ety. unknown]

(US) to steal.

[US]H. Ellison ‘Johnny Slice’s Stoolie’ in Deadly Streets (1983) 81: I was in the hole for gytching some of the H. [Ibid.] 82: Don’t know what the hell he ever did with all the hub-caps we used to gytch.